A must-read for Linux system administrators! File transfer SCP vs SFTP, which one do you choose?

As a senior system administrator, I have only used Linux for daily operations for many years. However, I recently encountered a problem that interests meLinux to linuxI need to transfer files from two devices. It seems easy to operate, but in fact there are quite a lot of complications. I would like to share my gains and losses from this experience with all readers.

1. Preparation: Make sure the network connection is stable

Before transferring files, be sure to confirm that the network connectivity between the two Linux servers is in good condition. This can be detected with the help of the ping command. Execute the following commands on the console:

ping

If you can receive a response, it means the network connection is normal.

2. Choose the appropriate transmission tool: SCP vs SFTP

In Linux systems, there are two main file transfer tools: SCP and SFTP. Among them, SCP (Secure Copy) is an efficient and secure file transfer technology using the SSH protocol; SFTP (SSH File Transfer Protocol) has richer functions and higher flexibility. Applicants should be selected based on actual needs to meet different data transmission needs.

3. Use SCP to transfer files

If you need to use the SCP device for file transfer, just execute the following command to quickly copy local resources to the remote server:

scp

If you want to copy files from the remote server to the local, you can use the following command:

scp

4. Use SFTP to transfer files

If you choose to use SFTP for file transfer, you can use the following commands to connect to the remote server.

sftp

Next, use commands similar to FTP to realize file transfer between local and remote. Taking transferring local files to a remote server as an example, you can use the following command:

put

To download files from the remote server to the local, you can use the following command:

get

5. Dealing with permission issues

In Linux systemTransfer files from linux to linux, permission allocation is crucial. When transferring files, Linux sets environment variables. Be sure to ensure that the target path has the appropriate permissions to accept files. You can use the following command to adjust the target path permissions:

chmod

6. Precautions when transferring large files

Challenges are often encountered in the process of transmitting large-capacity data. The first condition is to ensure that the bandwidth between connecting servers is sufficient to meet their respective transmission needs for large-scale data. When executing SCP and SFTP commands, you can add several parameters to set the transmission rate accordingly to avoid excessive network burden. For example, use the "-l" parameter with the SCP command to adjust the transmission rate:

scp -l

7. Error handling during transmission

It is not uncommon to encounter errors such as network connection interruptions and file permission issues while transferring files. Faced with these problems, we can rely on checking the actual command output or consulting detailed log files to obtain more detailed information, and further optimize the process according to the error prompts for troubleshooting.

Practice has enabled me to master many techniques and key points of file transfer between Linux servers. These valuable experiences not only greatly improved my daily work efficiency, but also provided me with an opportunity to deeply understand the Linux system. I hope that my experience sharing can bring enlightenment to readers and help you become more proficient in using the Linux operating system!

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